Locomotive driving-gear



(No Model.)

, G. ENGI-IOFER.

L'OCQMOTIVE DRIVING GEAR.-

,9Z1. Patented Apr. 29,1884.

.Z'NVEN TUE viz-N55555: i I 444 A0 .1; @WW 6 N. PETERS. Phntomhawphr. 'wnmmm o c,

UNITED STATES PATENT OFFICE. I

GOTTLIEB ENGHOFER, OF ATTLEBOROUGH, MASSACHUSETTS.

LOCOMOTIVE DRIVING-GEAR.

SPECIPICATION'forming part of Letters Patent No. 297,921, dated April 29, 1884.

' Application filed December 31, 1883. (No model.)

To aZZ whom it may concern:

Be it known that I, GOTTLIEB ENGHOFER, of Attleborough, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Locomotive Driving-Gear, of which the following is a specification.

My invention relates to the running or driv ing gear of locomotive-engines; and the object of my invention is to produce a locomotiveengine gear by means of which two complete revolutions of the driving-wheels shall be produced by one full stroke of the piston.

My invention consists in the parts and combination of parts hereinafter described and claimed. V

In the accompanying drawings, Figure 1 is a side elevation of a locomotive-boiler with my improvement applied. Fig. 2 is a detached view, partly in section and partly in side elevation, of the piston and my improved connections.

In the said drawings, A designates the boiler; a, the steam-dome thereof; B B, the driving-wheels, and B one of the connecting-rods. I have shown and will describe the drivinggear upon one side of the engine only, as the gear upon both sides of the engine is alike.

Instead of placing the cylinders low-down at the front end of the boiler, as heretofore, I place them high up and at the rear end of the boiler, as shown at O in Fig. 1. I connect the cylinder (3 with the steam-domed by the steampipes 0 c, and the steam whichenters the dome through the pipe c,-leading from the boiler, is directed into one or the other of the pipes c by a four-way valve, 0 which may be actuated by suitable connections from the drivinggear. r

O. O designate an L-' shaped frame, in the upper horizontal member of which oscillates a slide, (l to which the piston-rod is attached, while in the lower member of the frame moves the slide d to which the crank-rod G is attached.

d d designate the two arms of a toggle-joint, which is pivoted at its upper end to projections (1 upon the forward corners of the frame 0. The opposite end of the toggle-joint'd is pivoted to the upper end of thecrank-rod 0 while its middle joint is pivotally connected to the front end of the piston-rod link 0, the rear end of which is journaled upon the'frout end of the slide d. The lower end of the crankrod G is journaled'to the crank-pin p, upon whichalso the forward end of the connectingrod B is journaled.

The operation of the mechanism is as follows: Beginning the stroke with the pistonrod at its backward limit, by the time the slide (2 has moved half the length of the upper member of the frame 0, the crank will have made a half-revolution. When the slide 01 reaches the outer limit of its stroke, the crank will have made another half-revolution, and the relative movements of the slide d and the crank on the back half-stroke are repetitions of those on the forward half-stroke, the toggle-joint d bending as far backward as forward, so that two revolutions of the driving-wheels are produced by each complete return-stroke of the piston-rod.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A locomotive-engine driving-gear arranged in such manner that each full returnstroke of the piston shall produce two complete revolutions of the driving-wheels.

2. The combination, with the cylinder and frame 0 O, of the piston-rod and crank-rod and the toggle-joint d.

3. The combination, with the cylinder and I the frame 0 O, carrying the projection d, of the piston-rod, crank-rod, and toggle-joint, ar ranged and operating as described.

GOTTLIEB ENGHOFER.

Witnesses:

J. A. MILLER, Jr., M. F. BLIGH. 

